1312420045 has 8 divisors (see below), whose sum is σ = 1613316600. Its totient is φ = 1024327680.

The previous prime is 1312420001. The next prime is 1312420049. The reversal of 1312420045 is 5400242131.

It can be written as a sum of positive squares in 4 ways, for example, as 18507204 + 1293912841 = 4302^2 + 35971^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1312420045 - 2¹⁵ = 1312387277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312419998 and 1312420025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312420049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3200820 + ... + 3201229.

It is an arithmetic number, because the mean of its divisors is an integer number (201664575).

Almost surely, 2^1312420045 is an apocalyptic number.

It is an amenable number.

1312420045 is a deficient number, since it is larger than the sum of its proper divisors (300896555).

1312420045 is an equidigital number, since it uses as much as digits as its factorization.

1312420045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6402095.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1312420045 is about 36227.3383648316. The cubic root of 1312420045 is about 1094.8575518568.

Adding to 1312420045 its reverse (5400242131), we get a palindrome (6712662176).

The spelling of 1312420045 in words is "one billion, three hundred twelve million, four hundred twenty thousand, forty-five".